Base 5 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 648: | \[{5^{648}-1\over4}\] | 23 × 35 × 7 × 13 × 19 × 31 × 37 × 73 × 109 × 163 × 271 × 313 × 487 × 601 × 829 × 1783 × 4159 × 4861 × 5023 × 5167 × 31051 × 73009 × 390001 × 543097 × 1853281 × 3314953 × 6597973 × 16018507 × 1503418321 × 36280398313<11> × 503731168597<12> × 209290024478377<15> × 13012873776055827785521<23> × 14551915228363037109375001<26> × 720314410420100602530036001<27> × 2066067271380136212224701233463<31> × 11419697846380955982026777206637491<35> × 177309277461360218309390137951788241<36> × 8492577938450345455181723282785204933<37> × 14448621958263887100257660421295942561<38> × 17709835191653279747084490102037222907770443239248416682814366713<65> |